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BT-RX12 4 stroke 4 speed midbike

21K views 106 replies 35 participants last post by  zero4 
#1 ·
49cc air cooled 4 stroke 4 speed midbike will be here at the end of next week hopefully. Just thought i would share
 

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#35 ·
INASNT said:
I only payed $800 AUD. But you wont find em for that cheap anymore. They retail for $1300 AUD ;)
INASNT.....

Is that a true 70cc engine? or is it a bored/stroked 49cc?

Also, can you find performance parts for it pretty easily?

Last but not Least....

How's it still running? any problems? Still happy? Gone over 55mph yet?

Just curious. Sweet Bike.
 
#36 ·
WipeAway said:
INASNT.....

Is that a true 70cc engine? or is it a bored/stroked 49cc?

Also, can you find performance parts for it pretty easily?

Last but not Least....

How's it still running? any problems? Still happy? Gone over 55mph yet?

Just curious. Sweet Bike.
yes its a true 70cc loncin engine which is a copy of the honda cfr 70cc engine and tranny, which i have heard from people that have used them alot are rock solid!

Yes there is alot of performance parts from them, just like the 49cc engines, even a 110cc big bore stroker kit, cams, carbs, exhaust, intake and even a supercharger kit.

Yes its running sweet, i changed the oil to some full synthetic and replaced a few bolts with better grade ones.

Trying to find 1 of those GPS things in Australia so i can get proper speed.
Been busy away for work over last week so havent had a chance to ride it for a few days.
 
#37 ·
INASNT said:
yes its a true 70cc loncin engine which is a copy of the honda cfr 70cc engine and tranny, which i have heard from people that have used them alot are rock solid!

Yes there is alot of performance parts from them, just like the 49cc engines, even a 110cc big bore stroker kit, cams, carbs, exhaust, intake and even a supercharger kit.

Yes its running sweet, i changed the oil to some full synthetic and replaced a few bolts with better grade ones.

Trying to find 1 of those GPS things in Australia so i can get proper speed.
Been busy away for work over last week so havent had a chance to ride it for a few days.
INASNT..

Thnx 4 the quick reply man!

I'm definitely gonna get one. But where exactly can you get performance parts? I've tried to search, but I don't really find much of anything directly.

If you don't mind me bugging you, I certainly would appreciate your advice when the bike arrives, and to kind of compare notes as time goes by.
 
#38 ·
ill have a 70cc 4 stroke 4 speed x7 here shortly with cams, bigbores etc. For now the rx12 is the 4 stroke i got and its the same motor as my 4 stroke choppers and is almost identical to an xr50 motor.
it does have front and rear disc brakes too. The bike is heavy though about 145 lbs !

http://badazztoyz.com/images/bt-rx12/greenwhite.JPG
 
#40 ·
hello

sonik when i get home if i go up to your shop will you let me ride one of those? when are we going to seddel on those pbp grup buys? well at least bring them to the track in slc when we go racing there by the way i still dont have the address to the track in slc pm me back if you get a chance:D
badazztoyz.com said:
ill have a 70cc 4 stroke 4 speed x7 here shortly with cams, bigbores etc. For now the rx12 is the 4 stroke i got and its the same motor as my 4 stroke choppers and is almost identical to an xr50 motor.
it does have front and rear disc brakes too. The bike is heavy though about 145 lbs !

http://badazztoyz.com/images/bt-rx12/greenwhite.JPG
 
#41 · (Edited)
In Sweden we can now order this bike with a 123cc stock engine for 734 us dollars. It has double disc brakes in the front and single rear. The gear shifter looks as though is in the right position as well.

Sorry about the data being in Swedish.



Motor: 123cc (automat)
Max hastighet (km/h): 110
Kylning: Luft
Max effekt: 3.5 KW / 12.000 rpm
Tändning: CDI
Tankkapacitet: 1,5 liter
Transmission: 4 gears
Frambromsar: Dubbla hydrauliska skivor
Bakbromsar: Hydraulisk skiva
Framhjul: 14"
Bakhjul: 15"
Start: Manuell / Elektrisk
Dämpare (fram/bak): Ja / Ja
Längd (cm): 145
Max last (kg): 150

http://img78.exs.cx/img78/2092/d5wbse818.jpg
http://img78.exs.cx/img78/5615/y9w123ccautomatic.jpg
http://img78.exs.cx/img78/3365/x8fbse818front.jpg
http://img78.exs.cx/img78/2966/g2xbse818reardics.jpg
http://img78.exs.cx/img78/9109/n6pbse818speedmeter.jpg
 
#44 ·
Kimen..........


Where can you find engine parts for the Loncin engine that's in that bike?

I'm gett'n (it's on the way) that bike with a 70cc Loncin, and I would like to upgrade it to 123cc's.

I've been searching like crazy but I can't really find anything.

Pls Hlp..
 
#45 ·
the LONCIN 70cc motor is an exact replica of the HoNda CRF70 so just search for CRF 70 performance part they will fit your engine try to find

Get a Bigger Carb
Work On the Heads
Upgrade the Exaust system
Put a new pipe on
Change air fillter
Increase Carby jet size
and try and find the 125cc big bore kit or even a 110cc just search google there not that hard to find
and also if you would like there is a super charger avalible for all 4 stroke pocket bikes 8psi boost creats up to 10HP heres the link scroll to the bottom of the page http://www.globalwreckers.com.au/bikesforsale2.htm
hope i have helped a little bit ggood luck m8

sysstem-TrojAn

--------------------------------------------------------------------
110cc Mini Chopper Twin Turbo
2 Week 2 Days Remaining Untill My Beast Is Unleashed
Stay Tuned For Updates
 
#46 ·
WipeAway said:
INASNT..

Thnx 4 the quick reply man!

I'm definitely gonna get one. But where exactly can you get performance parts? I've tried to search, but I don't really find much of anything directly.

If you don't mind me bugging you, I certainly would appreciate your advice when the bike arrives, and to kind of compare notes as time goes by.
http://www.bbrmotorsports.com/Products/Products.htm

Go to Honda and CRF/XR70 and all the performance parts are available there as the Loncin 70cc engine in mine is the same as the Honda Crf 70cc engine so parts are interchangable. BARTW on these forums gave me all this info.
 
#47 ·
INASNT said:
http://www.bbrmotorsports.com/Products/Products.htm

Go to Honda and CRF/XR70 and all the performance parts are available there as the Loncin 70cc engine in mine is the same as the Honda Crf 70cc engine so parts are interchangable. BARTW on these forums gave me all this info.
Man...

You guys are life savers. This is by far the most informative forum I've ever been to. I really appreciate the info guys.......


...this is gonna b fun.......
 
#48 ·
system-TrojAn said:
the LONCIN 70cc motor is an exact replica of the HoNda CRF70 so just search for CRF 70 performance part they will fit your engine try to find

Get a Bigger Carb
Work On the Heads
Upgrade the Exaust system
Put a new pipe on
Change air fillter
Increase Carby jet size
and try and find the 125cc big bore kit or even a 110cc just search google there not that hard to find
and also if you would like there is a super charger avalible for all 4 stroke pocket bikes 8psi boost creats up to 10HP heres the link scroll to the bottom of the page http://www.globalwreckers.com.au/bikesforsale2.htm
hope i have helped a little bit ggood luck m8

sysstem-TrojAn

--------------------------------------------------------------------
110cc Mini Chopper Twin Turbo
2 Week 2 Days Remaining Untill My Beast Is Unleashed
Stay Tuned For Updates
I talked to global wreckers and that supercharger is off a 700cc subaru car engine. He said he has never installed a supercharger onto a 70cc engine and he could not guarantee the engine could handle it either!!

sysstem-TrojAn i think you should be the guinea pig and strap that supercharger to your 110cc chopper before the twin turbos go on.
 
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